These were the previous questions in June 2012
Russia in Revolution:
How far was Nicholas II responsible for the fall of the Romanovs in 1917?
or
To what extent was Trotsky's leadership of the Red Army the most important reason for the Survival of the Bolshevik Government?

Stalin's Russia:
Why could Stalin's opponents not prevent him from becoming the leader of the USSR in 1929?
or
How far did collectivisation change Russian agriculture from 1928-41?

So I would predict a question on the economy, does anybody else have any ideas??